Question

Rounded the 3 miles to 2.549 distance in number line

Answer 1

Well since you want to round the 2.549 to 3. You'll be able to remove the 9 at the end and make the # 2.55. Then you'd rounded the 5 at the end to make the # 2.6 . After you do that since the last # is a 6 you can rounded the 6 up to the highest whole # , which would be 3.
I think that's what you where talking about.

Answer 2

I believe the answer is 2.849